Great Lakes Water Levels (Feet) - United States Army

May 04, 2020 · The United States Army Corps of Engineers collects and disseminates this water level data in cooperation with NOAA and the Canadian Hydrographic Service. All data are provisional and are referenced to IGLD 1985. Blanks indicate data that are missing or not yet available. Great Lakes Water Levels * Mean levels are calculated by averaging the ... ................
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